KR102254687B1 - Functional fastener - Google Patents

Abstract

Disclosed is a functional fastener that can couple fastening objects to each other without deformation of the fastening objects even in a state in which a working space is secured only on one side of the fastening objects, and can continuously maintain fastening by securing sufficient fastening force. A functional fastener according to an embodiment of the present invention includes a bolt configured to be variable, wherein the bolt comprises: a body in which a thread is formed on the outer circumferential surface; and a head rotatably coupled to the body, and accommodated in the body or protruding outside the body.

Description

Functional fastener

The present invention relates to a functional fastener.

In general, bolts and nuts are used in various fields as fastening parts that connect a plurality of separated objects to each other.

The bolt is composed of a shaft portion that is formed with a thread and can be fastened with a nut, and a hexagonal head provided at one end of the shaft portion.

In such a case, when a plurality of objects are to be joined with a bolt, the shaft of the bolt is inserted into the overlapped objects, and then a nut is fastened to the shaft protruding outside of one object, and the plurality of objects are connected to the other side. They are in close contact with the head disposed on the outside of the object to be mutually coupled.

As a conventional bolt has a structure that can be inserted only in one direction into a fastening hole provided in a plurality of objects, sufficient working space in both directions of the objects to insert a bolt into a plurality of objects and fasten a nut to the bolt Must be secured.

That is, the conventional bolt has a structure that can be inserted into the object in only one direction so that the head having a larger diameter than the shaft portion is integrally provided at the end of the shaft portion, so that the head can be supported by the outer surface of the object.

Therefore, in order to mutually couple a plurality of objects using a conventional bolt and a nut fastened thereto, a sufficient working space must be secured in both directions of the objects.

However, the conventional bolt has a problem in that it is impossible to use it because it is impossible to fasten the nut in a structure in which the space on one side of the objects is closed.

On the other hand, in the related art, a separate space for work was formed by deforming the closed part in order to mutually couple objects whose one side space is closed.

However, in the above-described method, it is difficult to accurately fasten the bolt and the nut, so that sufficient fastening force cannot be secured, and thus, there is a problem that the fastening of the bolt and nut is easily released.

The present invention was conceived to solve the above problems, and an object of the present invention is that even when a working space is secured only on one side of the fastening objects, the fastening objects can be combined with each other without deformation of the fastening objects, and the fastening force is sufficiently It is to provide a functional fastener that can be secured and maintained continuously.

The subject of the present invention is not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

A functional fastener according to an embodiment of the present invention for solving the above problem includes a bolt configured to be variable, and the bolt includes: a body having a thread formed on an outer circumferential surface thereof; And a head rotatably coupled to the body and accommodated in the body or protruding outside the body.

When the head is accommodated inside the body, the head is disposed parallel to the central axis of the body and can enter and exit through a fastening hole formed in a fastening object together with the body, and when protruding to the outside of the body, the body It is disposed in a vertical state with respect to the central axis of the can be configured to support the outer surface of the fastening object.

The body includes: a first opening formed on one side along a direction perpendicular to a central axis of the body, a second opening formed on the other side, and an accommodation groove in which the head is accommodated; A first support surface supporting one end of the head accommodated in the receiving groove; A second support surface supporting the other end of the head accommodated in the receiving groove; A third support surface supporting one end of the head protruding to the outside of the body; And a fourth support surface supporting the other end of the head protruding to the outside of the body.

The head may include a fixed shaft coupled to the body and disposed in the receiving groove; And a support bar rotatably coupled to the fixed shaft and disposed in the receiving groove or protruding to the outside of the body, wherein the support bar rotates in a first rotation direction while being disposed outside the body After being accommodated in the receiving groove, it is supported on the first support surface and the second support surface and is arranged in a parallel state with respect to the central axis of the body, or in a state accommodated in the receiving groove, rotates in a second rotational direction. After protruding to the outside of the body, the third support surface and the fourth support surface may be supported and disposed in a vertical state with respect to a central axis of the body.

The support bar is disposed on one side of the fixed shaft along the longitudinal direction of the support bar, is supported by the first support surface when accommodated in the receiving groove, and protrudes to the outside of the body through the first opening A first support part supported on the fourth support surface in the state of being turned off; And disposed on the other side of the fixed shaft along the longitudinal direction of the support bar, supported by the second support surface when accommodated in the receiving groove, and protruding to the outside of the body through the second opening, the A second support portion supported on a third support surface may be included, and a length of the first support portion may be longer than a length of the second support portion.

A nut fastened to the screw thread and configured to press the fastening object coupled to the body by adjusting a relative distance with the support bar disposed in a vertical state with respect to the central axis of the body; A first washer coupled to the body and disposed between the fastening object and the nut, and configured to transmit a pressing force of the nut to the fastening object; And a second washer coupled to the body and disposed between the first washer and the nut, and configured to transmit a pressing force of the nut to the first washer.

The first washer may include: a first washer body that is bent in an arc shape so that an edge portion presses the fastening object; A hemispherical pressing protrusion disposed on one surface of the first washer body facing the fastening target and configured to press the fastening target at a plurality of positions; And a first locking ring coupled to the second washer, wherein the second washer comprises: a second washer body supported on the other surface of the first washer body; And a second locking ring coupled to the first locking ring.

One end is supported by a first seating groove formed on the outer surface of the second washer, and the other end is supported by a second seating groove formed on the outer surface of the nut, and is disposed between the second washer and the nut, and the center of the body It may further include a pressing elastic body configured to elastically support the second washer and the nut in the axial direction.

Further comprising a Teflon press-fit member having the same height as the screw thread by being inserted into a recessed groove formed on the outer surface of the body along the central axis direction of the body, wherein the Teflon press-fit member pressurizes the nut fastened to the screw thread. As a result, a screw thread is formed on the outer surface, and it can be press-fitted between the nut and the body.

It is fastened to the body, further comprising a protective cap configured to protect a part of the body exposed to the outside of the fastening object and the nut fastened to the body from the outside, wherein the protective cap is fastened to the body Fastening part; A cap portion disposed at an end of the fastening portion; A tubular shielding portion coupled to the cap portion and configured to be in close contact with an outer surface of the fastening object to close a space between the cap portion and the fastening object; And an elastic pressing portion accommodated in the cap portion and configured to elastically support the shield portion toward the fastening object.

It is accommodated in the second support, when the support bar is disposed in a vertical state with respect to the central axis of the body, it may further include a pressure detection sensor configured to sense the pressure applied from the fastening object by being pressed against the fastening object. have.

The pressure sensing sensor may include a pressure sensing unit accommodated in a sensor insertion groove formed in the second support unit and configured to sense a pressure; A support tube inserted into the sensor insertion groove and fixedly disposed in the sensor insertion groove; A sensing pin accommodated in the sensor insertion groove and pressed against the fastening object; And an elastic member disposed between the sensing pin and the pressure sensing unit and configured to transmit a pressure applied from the sensing pin to the pressure sensing unit.

According to an embodiment of the present invention, through a bolt having a head that can appear and protrude to the outside, even when a working space is secured only on one side of the fastening objects, the fastening objects can be mutually coupled without deformation of the fastening objects, and the fastening force is sufficiently It can be secured and the fastening can be maintained continuously.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the present invention.

1 is a cross-sectional view schematically showing a state in which a head of a functional fastener according to an embodiment of the present invention is accommodated in a body and inserted into a fastening hole of a fastening object.
2 is a cross-sectional view schematically showing a state in which a head of a functional fastener according to an embodiment of the present invention protrudes to the outside of a body to support an outer surface of a fastening object.
3 is an enlarged cross-sectional view showing a first washer and a second washer of a functional fastener according to an embodiment of the present invention.
4 is a cross-sectional view showing a state in which a pressing elastic body is disposed between a nut and a second washer of a functional fastener according to an embodiment of the present invention.
5 is a cross-sectional view showing a state in which a Teflon press-fit member is press-fit between a nut and a body of a functional fastener according to an embodiment of the present invention.
6 is a cross-sectional view showing a state in which a protective cap is fastened to a body of a functional fastener according to an embodiment of the present invention.
7 is a diagram schematically illustrating a pressure sensor disposed on a support bar of a functional fastener according to an embodiment of the present invention and a user terminal receiving a signal thereof.

Hereinafter, various embodiments will be described in more detail with reference to the accompanying drawings. The embodiments described herein may be variously modified. Certain embodiments may be depicted in the drawings and described in detail in the detailed description. However, specific embodiments disclosed in the accompanying drawings are only intended to facilitate understanding of various embodiments. Therefore, the technical idea is not limited by the specific embodiments disclosed in the accompanying drawings, and it should be understood to include all equivalents or substitutes included in the spirit and scope of the invention.

Terms including ordinal numbers such as first and second may be used to describe various elements, but these elements are not limited by the above-described terms. The above-described terms are used only for the purpose of distinguishing one component from other components.

In the present specification, terms such as "comprises" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof does not preclude in advance. When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. It should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle.

Meanwhile, a "module" or "unit" for a component used in the present specification performs at least one function or operation. In addition, the "module" or "unit" may perform a function or operation by hardware, software, or a combination of hardware and software. In addition, a plurality of "modules" or a plurality of "units" excluding "module" or "unit" to be performed in specific hardware or performed by at least one processor may be integrated into at least one module. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In addition, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be abbreviated or omitted.

1 is a cross-sectional view schematically showing a state in which a head of a functional fastener according to an embodiment of the present invention is inserted into a fastening hole of a fastening object while being accommodated in the body, and FIG. 2 is a functional fastening according to an embodiment of the present invention It is a cross-sectional view schematically showing a state in which the head of the sphere protrudes to the outside of the body to support the outer surface of the fastening object.

1 and 2, the functional fastener 1 (hereinafter referred to as “functional fastener 1”) according to an embodiment of the present invention includes a bolt 11 configured to be variable.

The bolt 11 is rotatably coupled to the body 111 and the body 111 having a thread 111A formed on the outer circumferential surface thereof, and is accommodated in the body 111 or protrudes to the outside of the body 111 It includes a head 112 that becomes

In the body 111, a first opening 111B1 is formed on one side along a direction perpendicular to the central axis of the body 111, a second opening 111B2 is formed on the other side, and a head 112 is formed therein. ) Is accommodated, the first support surface 111C supporting one end of the head 112 accommodated in the receiving groove 111B, and the other end of the head 112 accommodated in the receiving groove 111B A second support surface 111D supporting the body 111, a third support surface 111E supporting one end of the head 112 protruding to the outside of the body 111, and a head protruding to the outside of the body 111 ( A fourth support surface 111F for supporting the other end of 112) may be included.

When the head 112 is accommodated inside the body 111, the head 112 is arranged in a parallel state with respect to the central axis of the body 111 and is formed in the fastening object FO with the body 111 into a fastening hole FO1. When it is accessible and protrudes to the outside of the body 111, it may be arranged in a vertical state with respect to the central axis of the body 111 to support the outer surface of the fastening object FO.

The head 112 is coupled to the body 111 and is rotatably coupled to the fixed shaft 112A and disposed in the receiving groove 111B, and is rotatably coupled to the fixed shaft 112A and disposed in the receiving groove 111B, or It may include a support bar (112B) protruding to the outside of 111).

The support bar 112B rotates in the first rotation direction R1 and is accommodated in the receiving groove 111B while being disposed outside the body 111, and then the first support surface 111C and the second support surface It is supported by (111D) and disposed in a parallel state with respect to the central axis of the body 111, or in a state received in the receiving groove 111B, rotates in the second rotation direction (R2) and protrudes to the outside of the body 111. Thereafter, it is supported on the third support surface 111E and the fourth support surface 111F and may be disposed in a vertical state with respect to the central axis of the body 111.

The support bar 112B may include a first support part 112B1 and a second support part 112B2.

The first support part 112B1 is disposed on one side of the fixed shaft 112A along the longitudinal direction of the support bar 112B, and is supported by the first support surface 111C in a state accommodated in the receiving groove 111B. 1 In a state protruding to the outside of the body 111 through the opening 111B1, it may be supported on the fourth support surface 111F.

The second support part 112B2 is disposed on the other side of the fixed shaft 112A along the longitudinal direction of the support bar 112B, and is supported by the second support surface 111D in a state accommodated in the receiving groove 111B. 2 In a state protruding to the outside of the body 111 through the opening 111B2, it may be supported on the third support surface 111E.

The length L1 of the first support part 112B1 may be longer than the length L2 of the second support part 112B2.

The functional fastener 1 may further include a nut 2, a first washer 3, and a second washer 4.

The nut 2 is fastened to the thread 111A provided on the body 111, and adjusts the relative distance with the support bar 112B disposed in a vertical state with respect to the central axis of the body 111, so that the body 111 It may be configured to press the fastening object (FO) coupled to.

The first washer 3 is coupled to the body 111 and disposed between the fastening object FO and the nut 2, and may be configured to transmit a pressing force of the nut 2 to the fastening object FO.

The second washer 4 is coupled to the body 111 and disposed between the first washer 3 and the nut 2, and may be configured to transmit a pressing force of the nut 2 to the first washer 3 .

3 is an enlarged cross-sectional view showing a first washer and a second washer of a functional fastener according to an embodiment of the present invention.

Referring to FIG. 3, the first washer 3 may pressurize the fastening object FO at a plurality of positions, and may be configured to be fastened with the second washer 4.

The first washer 3 is disposed on one side of the first washer body 31 that is bent in an arc shape so that the edge portion presses the fastening target FO, and the first washer body 31 facing the fastening target FO. It may include a hemispherical pressing protrusion 32 configured to pressurize the fastening object FO at a plurality of positions, and a first locking ring 33 coupled to the second washer 4.

The second washer 4 may include a second washer body 41 supported on the other surface of the first washer body 31 and a second locking ring 42 coupled to the first locking ring 33 .

4 is a cross-sectional view showing a state in which a pressing elastic body is disposed between a nut and a second washer of a functional fastener according to an embodiment of the present invention.

Referring to FIG. 4, the functional fastener 1 may further include a pressing elastic body 5 for pressing the second washer 4.

The pressing elastic body 5 is disposed between the second washer 4 and the nut 2 and may elastically support the second washer 4 and the nut 2 in the direction of the central axis of the body 111.

Specifically, the pressing elastic body 5 is supported at one end in the first mounting groove 43 formed on the outer surface of the second washer 4, and the other end in the second mounting groove 21 formed on the outer surface of the nut 2 It is supported, is disposed between the second washer 4 and the nut 2, and may be configured to elastically support the second washer 4 and the nut 2 in the direction of the central axis of the body 111.

For example, the pressing elastic body 5 may be implemented in the form of a spring.

5 is a cross-sectional view showing a state in which a Teflon press-fit member is press-fit between a nut and a body of a functional fastener according to an embodiment of the present invention.

Referring to FIG. 5, the functional fastener 1 may be configured to continuously maintain the fastening of the bolt 11 and the nut 2.

The functional fastener 1 may further include a teflon press-fit member 6.

The Teflon press-fit member 6 is formed of a Teflon material, and is inserted into the recessed groove 111G formed on the outer surface of the body 111 along the central axis direction of the body 111 to have the same height as the thread 111A. have.

Accordingly, the Teflon press-fit member 6 is pressed against the nut 2 fastened to the thread 111A, and a thread is forcibly formed on the outer surface by the thread of the nut 2 rotated along the thread 111A, and the nut ( It can be press-fit between 2) and the body 111.

6 is a cross-sectional view showing a state in which a protective cap is fastened to a body of a functional fastener according to an embodiment of the present invention.

Referring to FIG. 6, the functional fastener 1 may further include a protective cap 7.

The protective cap 7 is fastened to the body 111 and may be configured to protect a part of the body 111 exposed to the outside of the fastening object FO and the nut 2 fastened to the body 111 from the outside. have.

The protective cap 7 is coupled to the fastening part 71 fastened to the body 111, the cap part 72 disposed at the end of the fastening part 71, and the cap part 72, and A tubular shielding portion 73 that is in close contact with the outer surface and configured to close the space between the cap portion 72 and the fastening object FO, and the shielding portion 73 that is accommodated in the cap portion 72 to fasten the fastening object ( It may include an elastic pressing portion 74 configured to elastically support the FO) side.

7 is a diagram schematically illustrating a pressure sensor disposed on a support bar of a functional fastener according to an embodiment of the present invention and a user terminal receiving a signal thereof.

Referring to FIG. 7, the functional fastener 1 may further include a pressure sensor 8.

The pressure sensor 8 is accommodated in the second support part 112B2, and when the support bar 112B is disposed in a vertical state with respect to the central axis of the body 111, it is pressed against the fastening object FO and thus the fastening object FO ) Can be configured to sense the applied pressure.

Accordingly, the user terminal 9 receives a signal from the pressure sensor 8, calculates a pressure value applied from the fastening object FO from the signal, and compares the calculated pressure value with a preset reference value to determine the pressure value. By displaying the change, information about the fastening state can be delivered to the user.

The pressure detection sensor 8 is accommodated in the sensor insertion groove 112B21 formed in the second support part 112B2, and is inserted into the pressure detection part 81 configured to sense pressure, and the sensor insertion groove 112B21 to insert the sensor. The support tube 82 fixedly disposed in the groove 112B21, the sensing pin 83 accommodated in the sensor insertion groove 112B21 and pressed against the fastening object FO, the sensing pin 83 and the pressure sensing unit ( 81) may include an elastic member 84 configured to transmit the pressure applied from the sensing pin 83 to the pressure sensing unit 81.

As described above, according to an embodiment of the present invention, through the bolt 11 provided with the body 111 and the head 112 protruding to the outside of the body 111, only one side of the fastening objects FO is provided with a working space. Even in the secured state, the fastening targets FO can be coupled to each other without deformation of the fastening targets FO, and the fastening can be maintained continuously by securing sufficient fastening force.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and the present invention is generally in the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. Of course, various modifications may be made by those skilled in the art, and these modifications should not be understood individually from the technical idea or perspective of the present invention.

1. Functional fastener
11.Volts
111. Body
111A. Thread
111B. Receiving groove
111B1. First opening
111B2. Second opening
111C. First support surface
111D. 2nd support surface
111E. 3rd support surface
111F. 4th support surface
111G. Recessed groove
112. Head
112A. Fixed shaft
112B. Support bar
112B1. First support
112B2. 2nd support
112B21. Sensor insertion groove
2. Nut
21. Second mounting groove
3. First washer
31. The first washer body
32. Pressure protrusion
33. The first hook
4. 2nd washer
41. The second washer body
42. The second hook
43. First mounting groove
5. Pressurized elastic body
6. Teflon press-fit member
7. Protective cap
71. Fastening part
72. Cap
73. Shield
74. Elastic pressing part
8. Pressure sensor
81. Pressure sensing unit
82. Support tube
83. Sense pin
84. Elastic member
9. User terminal
FO. Object to be fastened
FO1. Fastener

Claims (4)

delete delete delete Including a bolt configured to be variable,
The bolt is,
A body having a thread formed on the outer circumferential surface; And
It is rotatably coupled to the body, including a head accommodated in the body, or protruding to the outside of the body,
The head,
When accommodated inside the body, it is disposed in a parallel state with respect to the central axis of the body and can enter and exit through the fastening hole formed in the object to be fastened together with the body,
When protruding to the outside of the body, it is arranged in a vertical state with respect to the central axis of the body and configured to support the outer surface of the fastening object,
The body,
A receiving groove in which a first opening is formed on one side and a second opening is formed on the other side along a direction perpendicular to the central axis of the body, and the head is accommodated therein;
A first support surface supporting one end of the head accommodated in the receiving groove;
A second support surface supporting the other end of the head accommodated in the receiving groove;
A third support surface supporting one end of the head protruding to the outside of the body; And
And a fourth support surface supporting the other end of the head protruding to the outside of the body,
The head,
A fixed shaft coupled to the body and disposed in the receiving groove; And
And a support bar rotatably coupled to the fixed shaft and disposed in the receiving groove or protruding to the outside of the body,
The support bar,
In a state disposed outside of the body, rotated in a first rotation direction and received in the receiving groove, and then supported by the first support surface and the second support surface and disposed in a parallel state with respect to the central axis of the body, or ,
In a state accommodated in the receiving groove, it rotates in a second rotational direction and protrudes to the outside of the body, and is supported on the third and fourth support surfaces, and is disposed in a vertical state with respect to the central axis of the body. ,
The support bar,
It is disposed on one side of the fixed shaft along the longitudinal direction of the support bar, and is supported by the first support surface when accommodated in the receiving groove, and the first support surface protrudes to the outside of the body through the first opening. 4 a first support part supported on the support surface; And
It is disposed on the other side of the fixed shaft along the longitudinal direction of the support bar, is supported by the second support surface when accommodated in the receiving groove, and when protruding to the outside of the body through the second opening, the second 3 comprising a second support supported on the support surface,
The length of the first support is formed longer than the length of the second support,
A nut fastened to the screw thread and configured to press the fastening object coupled to the body by adjusting a relative distance with the support bar disposed in a vertical state with respect to the central axis of the body;
A first washer coupled to the body and disposed between the fastening object and the nut, and configured to transmit a pressing force of the nut to the fastening object;
A second washer coupled to the body and disposed between the first washer and the nut, and configured to transmit a pressing force of the nut to the first washer;
A protection cap fastened to the body and configured to protect a portion of the body exposed to the outside of the fastening object and the nut fastened to the body from the outside; And
Further comprising a pressure sensing sensor accommodated in the second support and configured to sense a pressure applied from the fastening object by being pressed against the fastening object when the support bar is disposed in a vertical state with respect to the central axis of the body,
The first washer,
A first washer body whose edge portion is bent in an arc shape to press the fastening object;
A hemispherical pressing protrusion disposed on one surface of the first washer body facing the fastening target and configured to press the fastening target at a plurality of positions; And
It includes a first locking ring coupled to the second washer,
The second washer,
A second washer body supported on the other surface of the first washer body; And
Including a second locking ring coupled to the first locking ring,
The protective cap,
A fastening part fastened to the body;
A cap portion disposed at an end of the fastening portion;
A tubular shielding portion coupled to the cap portion and configured to be in close contact with an outer surface of the fastening object to close a space between the cap portion and the fastening object; And
It includes an elastic pressing portion accommodated in the inside of the cap portion and configured to elastically support the shielding portion toward the fastening object,
The pressure detection sensor,
A pressure sensing unit accommodated in the sensor insertion groove formed in the second support unit and configured to sense a pressure;
A support tube inserted into the sensor insertion groove and fixedly disposed in the sensor insertion groove;
A sensing pin accommodated in the sensor insertion groove and pressed against the fastening object; And
And an elastic member disposed between the sensing pin and the pressure sensing unit and configured to transmit a pressure applied from the sensing pin to the pressure sensing unit.

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